otjllingworth



(No Model.)

G. R. GULLINGWORTH.

MAGHINE FOR OUTTING; GHIPPING, 6m.

Patented Oct. 13, 1885.

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tion upon the plane of the dotted lineocw,

UNITED STATES PATENT OFFICE.

GEORGE E. GULLINGWORTH, OF NEW YORK, N. Y.

MACHINE FOR CUTT me, CHIPPING, etc.

SPECIFICATION forming part of Letters Patent No. 328,197, dated October 13, 1885.

Application filed April 3, 18t5.

To an whom, it may concern.-

Be it known that I, GEORGE E. CULLING- WORTH, of the city and county of New York, in the State of New York, have invented a new and useful Improvement in Machines for Cutting, Chipping, Calking, and Analogous Uses, of which the following is a specification.

The object of my invention is to provide a small hand-machine in which the tool or implement is operated by steam or air,and which may be readily grasped in the hand and used as a substitute for the ordinary handtool and mallet or hammer.

The invention is more particularly in! ended for machines for cutting or dressing stone, but may be embodied in machines for chipping iron, for calking boilers or vessels,and for performing various kinds of work ordinarily performed by simple hand-tools and mallet or hammer.

The machine comprises a cylinder in the lower head of which is fitted the tool or implement, and which contains apiston capable of operation by steam or air pressure, and serving to deliver rapid hammer-like blows upon the tool or implement. The shank of the tool or implement which fits in the head of the machine is square, polygonal, or of corresponding form, and fits a socket of similar transverse section; and the invention consists in a novel combination of parts whereby the machine is rendered capable of adj ustment to diminish or increase the effect of the hammerlike blows of the piston upon the end of the tool or implement.

In the accompanying drawings, Figure 1 is a longitudinal section of a machine embodying my invention. Fig. 2 is a transverse sec- Fig. 1. Fig. 3 is a transverse section upon the plane of the dotted line 3 y, Fig. 1; and Fig. 4 is a transverse section upon the plane of the dotted line z z, Fig. 1.

Similar letters of reference designate corresponding parts in all the figures.

A designates the cylinder, which is preferably of cylindrical form externally, so that it may be conveniently grasped in the hand and shifted from place to place during the operation of the machine.

B designates the piston, which may be pro- Serial No.1o1,107.

(No model.)

through a stuffing-box, a, at the lower end of the cylinder.

A designates the lower end portion of the cylinder or an extension of the machine, which is screwed into the stuffing-box a, so as to form a gland therefor, and into the lower end of which is screwed a head or plug, A This portion A is of skeleton-like constrnction,its upperand lowerend portions being cylindrical and joined by bridges or arms a. As best shown in Fig. 3, these bridge portions or arms a are provided with inwardly-projecting ears or lugs a ,forming a shoulder therein, and between such shoulder and the head A are secured a cushion or buffer, I), of india-rubber or other analogous yielding material, and a metal washer or facing-piece, b, therefor.

The tool or implement:- O, which has an edge or end suitably shaped for the work to be performed, has a shank, G, fitting a socketin the head A", and extending inward through the buffer and facing-piece b b. This toolshank and its socket should be locked together so as to prevent them from turning independent of each other, and so that the toolshank may move lengthwise in the socket. As here shown, they are square in transverse section, but they may be of polygonal or other form,or they may be round and provided with a groove and spline or feather.

Upon the outer end of the head A is screwed a cap, A and the tool 0 has a shoulder which bears against this cap. As here shown, the shoulder'is formed by a pin, 0, in-

serted transversely through the tool and bearing against the outer side of the cap A The piston and rod B B are intended to strike rapid hammer-like blows upon the end of the tool-shank O, and thereby produce the cutting or other action which the tool. is intended to perform. During the operation of 9 5 the machine the latter is held with the tool pressed or placed against the work in proper position, whether the machine be used for cutting or dressing stone, or for chipping or cutting iron, or for calking vessels, boilers, or other articles composed of sheet metal.

It will be observed that by adjusting the cap A relatively to the head the shank G of the tool may be made to project more or less into and through the buffer 1) b, and in this way the force of the blow upon the tool may be regulated. If the cap A is screwed outward so that the shank of the tool will be en tirely within and shielded by the buffer, then the piston extension or rod B will expend a portion of its force in compressing the buffer before it reaches the shank of the tool and a light blow will be struck. If the cap A be adjusted inward so as to allow the shank of the tool to project through and beyond the buffer b b, then the piston rod or extension will strike with full force upon the shank of the tool and cause it to exert its maximum eflect.

The cylinder is provided near itslower end with a nipple, d, to which a flexible hose may be attached for supplying the machine with steam or compressed air under pressure, and a port or passage, (1, formed in the cylinder A connects the latter above and below the piston B.

The cylinder A is closed at its inner or upper end by a head, A, in which is fixed an exhaust-pipe, D, projecting into a central cavity or bore in the piston and piston-extension B B, and provided with side openings, (1*.

E designates a valve, which consists of a ring fitting within the cylinder and through which the piston-rod B moves freely without friction. The length of free movement of the piston-rod without moving the valve is limited by shoulders, one of which is formed by the piston and the other of which is formed by studs or projections b on the rod B.

Suppose that the parts are in the position shown in Fig. 1. The port or passage (1 below the piston being covered by the valve E, steam or air admitted continuously through the nipple d will force the piston upward until the projections b strike the end of the valve E and move it so as to uncover the lower end of the port (1. The steam or air then passes freely through the port d to the upper end of the cylinder, and acting on the upper end of the piston forces it downward and causes it to deliver a hammer-like blow upon the tool. This downward movement of the tool terminates when the side openings, (1*, in the exhaust-pipe D are uncovered, as shown in Fig. 1, thus permitting the fluid from the upper end of the cylinder to exhaust from said pipe; and just before this occurs the piston will strike the valve E and move it sufficiently to cover the lower end of the port (2. The piston will then be forced upward again by the pressure on its lower end, and will deliver blows in rapid succession upon the tool or implement.

What I claim as my invention, and desire to secure by Letters Patent, is

1. In a machine for use as herein described, the combination, with a cylinder and piston, and piston-rod movable therein, of asocketed head applied to the end of the cylinder, a cushion or buffer supported by said head, and a tool the shank of which is fitted to the socket in said head, and which is adjustable lengthwise therein to bring its inner end more or less within range of the hammer-like blows of the piston-rod, substantially as and for the purpose herein described.

2. The combination, with a cylinder and piston, and piston-rod movable therein, of a socketed head applied to the lower end of the cylinder, a buffer or elastic cushion at the lower end of the cylinder, a shouldered tool or implement the shank of which is fitted to a socket in said head, and an adjustable cap applied to the head and serving to hold the tool in position lengthwise by acting against the shoulder thereof, whereby the tool may be adjusted to bring its inner end more or less within range of the hammer-like blows of the pistonrod, substantially as and for the purpose herein described.

3. The combination, with the cylinder A and its piston and piston-rod B B, of the portion A,screwed into the lower end of the cylinder and forming a stuffing-box gland therein, the head A securedin the portion A, a buffer or elastic cushion, b b, confined in place between a shoulder in the portion A and the head A the adjustable cap A, and a tool or implement, 0, provided witha shoulder bear ing against said cap, substantially as and for the purpose herein described.

G. R. GULLINGWORTH.

Witnesses:

C. HALL, FREDK. HAYNES. 

